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<table width="100%" summary="page for terbuthylazin"><tr><td>terbuthylazin</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>The effect of terbuthylazin on growth rate</h2>

<h3>Description</h3>

<p>Test on the effect of terbuthylazin on  <em>Lemna minor</em>, performed on an aseptic
culture according to the OECD-guidelines.  
</p>


<h3>Usage</h3>

<pre>data(terbuthylazin)</pre>


<h3>Format</h3>

<p>A data frame with 30 observations on the following 2 variables.
</p>

<dl>
<dt>dose</dt><dd><p>a numeric vector of dose values.</p>
</dd>
<dt>rgr</dt><dd><p>a numeric vector of relative growth rates.</p>
</dd>
</dl>



<h3>Details</h3>

<p>Dose is </p>
<p style="text-align: center;"><i>&mu; l^{-1}</i></p>
<p> and rgr is the relative growth rate of <em>Lemna</em>.  
</p>


<h3>Source</h3>

<p>Cedergreen N. (2004). Unpublished bioassay data.
</p>


<h3>Examples</h3>

<pre>

## displaying first 6 rows of the data set
head(terbuthylazin)

## Fitting log-logistic model
terbuthylazin.m1 &lt;- drm(rgr~dose, data = terbuthylazin, fct = LL.4())
summary(terbuthylazin.m1)

## Fitting log-logistic model
##  with Box-Cox transformation
terbuthylazin.m2 &lt;- boxcox(terbuthylazin.m1, method = "anova")
summary(terbuthylazin.m2)

</pre>


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